Methods for manufacturing absorbent products.

Abstract

Updated 29 / 03 / 2017 The purpose of this invention is to provide a method for manufacturing absorbent products. This method allows for deployment in desired locations and at high utilization rates. The microcapsules do not break down in water, containing volatile functional components. This invention is manufactured with the following components: Method of manufacturing absorbent products (1) consisting of: Permeable layer (2), impermeable layer (3) and absorbent layer (4) such methods It consists of the following steps: The process of creating functional components through micro-mixing. The capsules do not dissolve in water, containing volatile functional components that are susceptible to solvents. Preserving functional components as they are encapsulated; component coating process. The functional aspect on a part is at least the minimum surface area of ​​the layer to be coated to form a region. Coat the functional component (8) on the surface to be coated and the layering step of the liquid. Permeable (2) and absorbent layer (4) and impermeable liquid layer (3) with adhesive coating area (9) Coated with adhesive in between. -------------------------------------------------- The purpose of this invention is to provide a method for manufacturing absorbent products. This method allows for deployment in desired locations and at high utilization rates. The microcapsules do not break down in water, containing volatile functional components. This invention is manufactured with the following components: Method of manufacturing the absorbent product (1) which consists of: Permeable layer (2), impermeable layer (3) and absorbent layer (4) such methods It consists of the following steps: The process of creating functional components through micro-mixing. The water-insoluble capsule encloses the volatile functional components along with the solvent. Capable of storing functional components encapsulated in microcapsules; a coating process to... The functional components are coated onto a portion of the surface of the layer to be coated. To create a coating area for functional components (8) on the surface to be coated and the arrangement steps. A layer of permeable liquid (2), an absorbent layer (4), and an impermeable liquid layer (3). With the adhesive coating area (9) coated with adhesive inserted in between;

Description

This disclosure relates to a method for manufacturing an absorbent article. Absorbent articles having fragrance and cooling functions are known. For example, Patent Document 1 describes an absorbent article comprising a cooling material containing a cooling agent between a surface sheet and a back sheet. In the absorbent article of Reference 1, the cooling agent is protected by a water-soluble polymer cell, and the cooling agent is released after coming into contact with the user's bodily fluids. Reference 1 also describes a method for manufacturing an absorbent article by filling the pores of a surface treatment roll with a cooling material containing a cooling agent protected by polymer cells, and transferring it to a material coated with a hot-melt adhesive. Japanese Patent Publication No. 2010-234031 In the method for manufacturing absorbent articles described in Patent Document 1, the cooling agent containing a cooling agent protected in polymer cells is applied in powder form, which leaves room for improvement as the cooling agent is easily dispersed into the atmosphere and high-speed production is difficult. Therefore, the object of this disclosure is to provide a method for manufacturing absorbent articles that allows for high-speed application of water-disintegrable microcapsules containing volatile functional components to desired locations. The Disclosers have found a method for producing an absorbent article comprising a liquid-permeable layer, a liquid-impermeable layer, and an absorbent layer between the liquid-permeable layer and the liquid-impermeable layer, the method comprising the steps of: mixing water-disintegrable microcapsules containing a volatile functional component with a solvent capable of retaining the functional component encapsulated in the microcapsules to form a functional composition; coating at least a portion of the surface to be coated of the layer to be coated with the functional composition to form a functional composition coated area on the surface to be coated; and stacking the liquid-permeable layer, the absorbent layer, and the liquid-impermeable layer with an adhesive coated area in between. The method for producing an absorbent article of this disclosure allows for the rapid application of water-disintegrable microcapsules containing volatile functional components to a desired location. FIG. 1 is a plan view of an absorbent article manufactured by a manufacturing method according to one embodiment of the present disclosure. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1. FIG. 3 is a view for explaining a method of manufacturing an absorbent article according to one embodiment of the present disclosure. FIG. 4 is a view for explaining a method of manufacturing an absorbent article according to one embodiment of the present disclosure. FIG. 5 is a plan view of an absorbent article manufactured by a manufacturing method according to another embodiment of the present disclosure. [Definitions] Some terms used in this specification are defined below. [Microcapsules] As used herein, a microcapsule means a capsule having a size of 1 to 1,000 μm in diameter and having a space for encapsulating a core material (functional component). The above capsule is not particularly limited in its external shape as long as it can encapsulate the core material and control the release of the core material. Examples of the external shape include spherical, irregular, etc. Further, the above capsule can be a mononuclear type having one space for holding the core material or a multinuclear type having a plurality of spaces for holding the core material. Examples of the shape of the above space include spherical, irregular, etc. Examples of the above microcapsules include those having a spherical appearance and a multinuclear space. [Water-disintegrability] As used herein, "water-disintegrability" is a term related to microcapsules and means the property of disintegrating to such an extent as to release the encapsulated functional component upon contact with a liquid (aqueous solution) such as body fluid. Specifically, when the microcapsule comes into contact with a liquid, examples include cases where the material of the microcapsule dissolves in water and disintegrates, cases where the microcapsule swells in water upon contact with the liquid and its strength decreases, and cases where the microcapsule is destroyed and disintegrates. [Wearer] As used herein, the "wearer" means the wearer of an absorbent article, for example, a baby in a disposable diaper, a person requiring care, etc., and a woman in a sanitary napkin. [User] In this specification, the "user" means the user of an absorbent article, and in addition to the above wearer, it means a person who causes the wearer to wear the absorbent article, for example, a mother, a caregiver, etc. in a disposable diaper. [Opposite surfaces] In this specification, "opposite surfaces" means the surfaces of two adjacent layers that face each other. The method for manufacturing an absorbent article according to this disclosure, and the absorbent article manufactured by said method, will be described in detail below, with drawings as necessary (hereinafter, the method for manufacturing an absorbent article may be simply referred to as the "manufacturing method"). To understand this disclosure, we will first describe an absorbent article manufactured by the manufacturing method according to one of the embodiments of this disclosure. Figure 1 is a front view of an absorbent article manufactured by a method according to one embodiment of the present disclosure, more specifically, a front view of a sanitary napkin. Figure 2 is a cross-sectional view taken along the line II-II in Figure 1. The absorbent article 1 shown in Figures 1 and 2 comprises a top sheet 2 as a liquid-permeable layer, a back sheet 3 as a liquid-impermeable layer, and an absorbent material 4 as an absorbent layer between the top sheet 2 and the back sheet 3. Note that Figure 2 has been enlarged, particularly in the thickness direction of the absorbent article 1, to facilitate understanding of this disclosure. For example, in Figure 2, a space is created between the adhesive application area 9'' and the top sheet 2 to show the functional composition application area 8 (8' and 8''), but in reality, the adhesive application area 9'' joins the absorbent 4 and the top sheet 2. The absorbent article 1 shown in Figure 1 is provided with a pair of side flaps 6 formed from a side sheet 5 and a back sheet 3 on both sides of the longitudinal direction of the absorbent article 1, for securing the absorbent article 1 to the wearer's clothing, such as shorts. The absorbent article 1 shown in Figure 1 also has three adhesive-coated areas 9 (9', 9'', 9''') between the top sheet 2 and the absorbent body 4, where adhesive is applied and extends in the planar direction of the absorbent article 1. The three adhesive-coated areas 9 (9', 9'', 9''') are arranged along the longitudinal direction of the absorbent article 1 and at regular intervals in the width direction of the absorbent article 1. In each adhesive-coated area 9, the adhesive is arranged along the longitudinal direction of the absorbent article 1 in a reciprocating motion (Z-shape) in the width direction of the absorbent article 1. The three adhesive-coated areas 9 (9', 9'', 9''') are also arranged in contact with the top sheet 2. The absorbent article 1 shown in Figure 1 has two functional composition coated areas 8 (8', 8'') between the top sheet 2 and the absorbent body 4, where the functional composition is applied in a planar direction to the absorbent article 1. The functional composition coated areas 8' and 8'' are arranged planarly between the top sheet 2 and the absorbent body 4, in contact with the adhesive coated areas 9' and 9'''', respectively. The functional composition coated areas 8' and 8'' are also arranged in contact with the top sheet 2. The composition of the functional composition will be described later. The adhesive application area 9'' has an adhesive area 10 that directly joins the top sheet 2 and the absorbent 4. Furthermore, each of the adhesive application areas 9' and 9'''' has an adhesive area 10 that directly joins the top sheet 2 and the absorbent 4, and a microcapsule holding area 11. Note that the adhesive area 10 is not in contact with the functional composition application area 8; more specifically, the adhesive area 10 does not contain the solvent, which is a component of the functional composition, and joins the top sheet 2 and the absorbent 4. In the microcapsule holding area 11, a tacky adhesive holds the microcapsules that constitute the functional composition. The absorbent article 1 shown in Figure 1 has a plurality of embossed portions 7 formed by embossing a top sheet 2 and an absorbent 4 with a functional composition coated area 8 sandwiched in between. These embossed portions 7 hold the functional components encapsulated in microcapsules in areas that overlap with the functional composition coated area 8 in the thickness direction of the absorbent article 1. Next, the manufacturing method of this disclosure will be described using Figures 3 and 4, which are embodiments thereof, as necessary. Figure 3 is a diagram illustrating a method for manufacturing an absorbent article according to one embodiment of this disclosure, and specifically, it is a diagram illustrating the method for manufacturing an absorbent article shown in Figures 1 and 2. Figure 4 is an enlarged perspective view of the process of coating the top sheet 2 with a functional composition using a functional composition coating machine 102. The absorbent article produced by the method of this disclosure includes a liquid-permeable layer, a liquid-impermeable layer, and an absorbent layer between the liquid-permeable layer and the liquid-impermeable layer. The liquid-permeable layer, the liquid-impermeable layer, and the absorbent layer are also referred to in the art as the top sheet, back sheet, and absorbent, respectively. The liquid-permeable layer, the liquid-impermeable layer, and the absorbent layer may be formed from materials known in the art, but the liquid-impermeable layer is preferably a nonwoven fabric from the viewpoint of retaining the solvent of the functional composition. The manufacturing method of this disclosure includes the step of mixing water-disintegrable microcapsules containing a volatile functional component with a solvent capable of retaining the functional component encapsulated within the microcapsules to form a functional composition (sometimes referred to as the "functional composition forming step"). Details of the functional composition will be described later. The manufacturing method of the present disclosure includes a step of applying a functional composition to at least a portion of the surface of the layer to be coated, thereby forming a functional composition coated area on the surface to be coated (this may be referred to as the "functional composition coated area forming step"). Examples of the layer to be coated include a liquid permeable layer and an absorbent layer, and examples of the surface to be coated include the non-skin contact surface of the liquid permeable layer and the liquid permeable layer side surface of the absorbent layer. When the surface to be coated is a non-skin contact surface of a liquid-permeable layer, the absorbed liquid can be rapidly delivered to the microcapsules, allowing for rapid release of the functional components. In this specification, the target of the coating (the layer to be coated) and the surface to be coated is a functional composition. Furthermore, if the absorbent article includes a liquid-permeable layer and an auxiliary sheet layer between the absorbent layer, the surface to which the above-mentioned layer should be coated includes the liquid-permeable layer side of the auxiliary sheet and the absorbent side of the auxiliary sheet. In the manufacturing method of this disclosure, the functional composition may be coated using coating machines known in the art, such as roll-type coating machines, curtain-type coating machines, slit-type coating machines, spray-type coating machines, dip-type coating machines, bead-type coating machines, flexographic coating machines, gravure coating machines, etc. The above-mentioned functional composition is preferably applied by a contact-type coating machine in which the outlet of the functional composition is in contact with the surface to be coated. This is because the functional composition can be placed in the desired position without scattering the functional composition, that is, the functional composition coating area can be placed in the desired position. Examples of the above-mentioned contact-type coating machines include roll-type coating machines, slit-type coating machines, dip-type coating machines, bead-type coating machines, flexographic coating machines, and gravure coating machines. In the embodiments shown in Figures 1 and 2, the functional composition coating area 8 is formed in a planar shape in contact with the top sheet 2. However, in the manufacturing method of this disclosure, the functional composition coating area is not limited to those shown in Figures 1 and 2, and can be formed in a planar, linear, spiral, Z-shaped, linear, dot-shaped, etc. Furthermore, the functional composition coating area can be formed along the longitudinal or width direction of the absorbent article. Moreover, the functional composition coating area can be formed at the center of the longitudinal direction of the absorbent article, or on both sides of the longitudinal direction of the absorbent article. In the manufacturing method of this disclosure, the functional composition is applied such that the basis weight of the functional composition in the functional composition application area is preferably 1 to 12 g / m2, and more preferably 2 to 10 g / m2. If the basis weight is less than 1 g / m2, the functional components may have difficulty exhibiting their functions, and if the basis weight is greater than 12 g / m2, the solvent may inhibit bonding by the adhesive. The manufacturing method of the present disclosure includes a step (sometimes referred to as the "stacking step") of stacking a liquid-permeable layer, an absorbent layer, and a liquid-impermeable layer with an adhesive-coated area in between, on which an adhesive is applied. The adhesive-coated area may be formed at any position between the liquid-permeable layer and the absorbent layer, and between the absorbent layer and the liquid-impermeable layer. Furthermore, if the absorbent article includes an auxiliary sheet layer between the liquid-permeable layer and the absorbent layer, the adhesive-coated area may be formed at any position between the liquid-permeable layer and the auxiliary sheet layer, and between the auxiliary sheet layer and the absorbent layer. In the manufacturing method of this disclosure, the adhesive can be applied using an apparatus known in the art, such as a hot melt gun. For example, by applying the adhesive using a hot melt gun in a back-and-forth motion in the width direction of the absorbent article, extending in the longitudinal direction of the absorbent article, an adhesive application area 9 as shown in Figure 1 is formed. In the manufacturing method of this disclosure, the adhesive used to form the adhesive application area is an adhesive known in the art, such as a hot melt adhesive. In the manufacturing method of this disclosure, the shape of the adhesive coating area formed is not particularly limited, and examples include spiral, Z-shaped, linear, and dot-shaped shapes, and the formed adhesive coating area can be arranged along the longitudinal or widthwise direction of the absorbent article. The layer to be coated preferably has a fiber density of 0.02 to 0.1 g / cm³, and more preferably 0.04 to 0.08 g / cm³. Having the above fiber density in the layer to be coated makes it easier for the coated functional composition to be drawn into the layer, making it less likely for the coated functional composition to remain on the surface of the layer, and reducing the likelihood of the functional composition, especially microcapsules, scattering during the transport of the layer to be coated. The layer to be coated preferably has a thickness of 0.2 to 2.0 mm, and more preferably 0.4 to 1.0 mm. Having a thickness within this range makes it less likely for the functional composition to come into direct contact with the wearer's skin. Furthermore, it allows the functional composition to act more effectively on the wearer's skin. The thickness of the layer to be coated is measured using an FS-60DS (measuring probe: 15 cm², measuring load: 3 gf / cm²) manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd. Specifically, the thickness of the layer to be coated, after being left standing in a constant temperature room at 20°C for 24 hours, is measured at five locations using the FS-60DS, and the average value is adopted as the thickness. In this specification, fiber density is calculated by dividing the basis weight of the layer to be coated by its thickness. The basis weight is calculated by dividing the mass of the layer to be coated, after being left standing in a constant temperature room at 20°C for 24 hours, by its area. The thickness is measured as described above. In the manufacturing method of the present disclosure, the surface to be coated (or the surface opposite to the surface to be coated) has an adhesive coating area, and in the functional composition coating area formation step, at least a portion of the adhesive coating area of ​​the surface to be coated (or the area opposite to the adhesive coating area of ​​the surface to be coated) is coated with the functional composition, and it is preferable that the adhesive coating area has a microcapsule holding area that holds microcapsules in a range that overlaps with the functional composition coating area in the thickness direction of the absorbent article. By doing so, the microcapsule-holding region (for example, indicated by reference numeral 11 in Figures 1 and 2) holds the microcapsules, making it less likely for the position of the first functional ingredient to shift during use. Furthermore, if the microcapsule-holding region is present on the non-skin-contacting surface of the liquid-permeable layer, the liquid that has passed through the liquid-permeable layer can quickly reach the microcapsules, allowing the first functional ingredient to be released with a small amount of liquid. In the manufacturing method of this disclosure, it is preferable that the surface to be coated (or the surface opposite to the surface to be coated) has an adhesive coating area, and in the functional composition coating area formation step, a "part" of the adhesive coating area of ​​the surface to be coated (or the area opposite to the adhesive coating area of ​​the surface to be coated) is coated with the functional composition, and the adhesive coating area has a microcapsule holding area that holds microcapsules in a range that overlaps with the functional composition coating area in the thickness direction of the absorbent article, and has an adhesive area that directly or indirectly joins the liquid permeable layer and the absorbent layer in a range that does not overlap with the functional composition coating area in the thickness direction of the absorbent article. The presence of an adhesive area in the absorbent article makes it less likely to twist during use. Furthermore, it is preferable that the adhesive region does not contain the solvent that constitutes the functional composition. This is because the solvent tends to inhibit the adhesive from directly or indirectly bonding the liquid-permeable layer and the absorbent layer. In this specification, "the adhesive region does not contain the solvent that constitutes the functional composition" means that the adhesive constituting the adhesive region contains the solvent in an amount of 0 to 5% by mass. The manufacturing method of this disclosure may include, after the functional composition coating area formation step, a step of applying an adhesive to at least a portion of the functional composition coating area (or an area opposite to the functional composition coating area) to form an adhesive coating area that overlaps with the functional composition coating area in the thickness direction of the absorbent article. The step of forming the functional composition coating area and the step of forming the adhesive coating area may be performed in either order. In the manufacturing method of this disclosure, as shown in Figures 1 and 2, after the functional composition coating area formation step, the method may further include a step of forming an embossed portion by embossing at least a liquid permeable layer and an absorbent layer with the functional composition coating area in between. In the functional composition coating area, the solvent constituting the functional composition tends to inhibit the adhesive from directly or indirectly bonding the liquid permeable layer and the absorbent layer. Having an embossed portion in the absorbent article strengthens the bond between the liquid permeable layer and the absorbent layer, making the absorbent article less prone to warping during use. The embossed portion holds the first functional component encapsulated in microcapsules, allowing the embossed portion to continuously hold the microcapsules, and consequently the first functional component, in a specific position. Furthermore, due to the high fiber density of the embossed portion, liquid tends to be preferentially guided to the embossed portion, enabling the release of the first functional component with a small amount of liquid. If the absorbent article includes an auxiliary sheet layer between the liquid permeable layer and the absorbent layer, in the functional composition coating area formation step, the surface of the auxiliary sheet layer on the liquid permeable layer side or the surface on the absorbent layer side can be coated with the functional composition to form a functional composition coating area on the surface on the liquid permeable layer side or the surface on the absorbent layer side. Next, embodiments shown in Figures 3 and 4 will be described. A functional composition is applied from a functional composition applicator 102 to the surface (non-skin contact surface) of the strip-shaped top sheet 2 unwound from the top sheet roll 101 on which the absorbent material is stacked, forming functional composition application areas 8 (8' and 8'') on the top sheet 2. Then, an adhesive is applied from an adhesive applicator 103, forming three adhesive application areas 9 (9', 9'' and 9'''') on the top sheet 2, with the functional composition application areas 8 (8' and 8'') in between. Next, absorbents 4 discharged from the absorbent manufacturing apparatus 104 are stacked on the top sheet 2 having a functional composition coating area 8 and an adhesive coating area 9 to form a stacked object 109. The absorbent manufacturing apparatus 104 is known in the art, and the absorbent manufacturing apparatus 104 shown in Figure 3 has a material supply unit 105, a suction drum 106, a concave shape 107 formed on the outer surface of the suction drum 106, and a suction unit 108. Next, the stacked material 109 is embossed with a pair of embossing rolls 111 to form an embossed portion 7 on the stacked material 109. Adhesive is applied from an adhesive applicator 122 to a strip-shaped backsheet 3 unwound from a backsheet roll 121, and the backsheet is stacked on top of the stacked material 109 with the embossed portion 7 formed on it to form a stacked material 123. Next, the stacked material 123 is round-embossed into the shape of an absorbent article using a pair of embossing rolls 131, and then cut into the shape of an absorbent article with a cutter 141 to manufacture an absorbent article 1. Figure 5 is a cross-sectional view of an absorbent article manufactured by a method according to another embodiment of the present disclosure. Figure 5 corresponds to the II-II section of Figure 1. The absorbent article 1 shown in Figure 5 includes an auxiliary sheet 12 between a top sheet 2 and an absorbent 4, with functional composition application areas 8 (8' and 8'') and adhesive application areas 9 (9', 9'' and 9'''') formed between the auxiliary sheet 12 and the absorbent 4. In the absorbent article 1 shown in Figure 5, the functional composition application areas 8 are also positioned in contact with the auxiliary sheet 12, and the adhesive application areas 9 are positioned in contact with the absorbent 4. The remaining parts are the same as those in the embodiments shown in Figures 1 and 2 and will not be described. The absorbent article 1 shown in Figure 5 is manufactured by stacking an auxiliary sheet (not shown) unwound from an auxiliary sheet roll (not shown) on top of a top sheet 2 unwound from a top sheet roll 101 in Figure 3, with an adhesive optionally sandwiched in between, applying a functional composition from a functional composition coating machine 102 onto the auxiliary sheet, then applying an adhesive from an adhesive coating machine 103, and carrying out the other steps in the same manner as in Figure 3. In the embodiment shown in Figure 5, a layer of auxiliary sheet is added between the functional composition and the wearer, which tends to make the effect of the functional components on the wearer's skin milder. The material of the auxiliary sheet can be the same as that of the top sheet, for example, a nonwoven fabric. In the embodiment shown in Figure 5, both the functional composition coating area and the adhesive coating area were located between the auxiliary sheet layer and the absorbent layer. However, in a manufacturing method according to yet another embodiment of the present disclosure, the functional composition coating area and / or the adhesive coating area are formed between the liquid-permeable layer and the auxiliary sheet layer. This makes it easier for the absorbed liquid to dissolve the microcapsules and for the first functional component to be released. The above functional composition comprises a water-disintegrable microcapsule containing a volatile functional component, and a solvent capable of retaining the functional component encapsulated within the microcapsule. The functional composition may further contain a volatile second functional component dissolved in the solvent. In this specification, the functional component encapsulated in the microcapsule may be referred to as the "first functional component" to distinguish it from the second functional component. In this specification, the first functional component and / or the second functional component may simply be referred to as the "functional component." The second functional component can be applied to the surface of the layer to be coated as a functional composition containing microcapsules, the second functional component, and a solvent. Alternatively, the second functional component can be dissolved in a solvent separately from the functional composition containing microcapsules and a solvent, as needed, and then applied to the surface of the layer to be coated. The functions of the first and second functional components are not particularly limited, as long as they provide the user with comfort compared to when the components are absent. Examples include fragrance, cooling, deodorizing, antibacterial, skincare, and any combination thereof. The functional components having the above-mentioned aromatic function are not particularly limited as long as they are used as fragrances in this art, and examples include highly volatile fragrances with a boiling point of about 250°C or less, and medium-volatile fragrances with a boiling point of about 250 to about 300°C. Note that functional components having an aromatic function are sometimes referred to as aromatic components. Examples of the above-mentioned highly volatile fragrances include anisole, benzaldehyde, benzyl acetate, benzyl alcohol, benzyl formate, isobornyl acetate, citronellal, citronellol, citronellyl acetate, paracymene, decanal, dihydrolinalool, dihydromyrcenol, dimethylphenylcarbinol, eucalyptol, l-carbone, geranial, geraniol, geranyl acetate, geranyl nitrile, nerol, neryl acetate, nonyl acetate, linalool, linalyl acetate, phenylethyl alcohol, α-pinene, β-pinene, γ-pinene, α-ionone, β-ionone, γ-ionone, α-terpineol, β-terpineol, terpinyl acetate, tentalome, and the like. Examples of the above-mentioned volatile fragrances include amyl cinnamaldehyde, methyl dihydrojasmonate, isoamyl salicylate, β-caryophyllene, cedrene, cedyl methyl ether, cinnamon alcohol, coumarin, dimethylbenzylcarbyl acetate, ethyl vanillin, eugenol, isoeugenol, γ-methylionone, heliotropin, hexyl salicylate, cis-3-hexenyl salicylate, phenylhexanol, vanillin, and pentalide. The above fragrance components include a fragrance having a green herbal-like aroma. This green herbal-like fragrance can safely and easily alleviate particularly unpleasant mental symptoms among menstrual symptoms without causing physical irritation to the body or requiring oral administration, and also provides the user with a sense of comfort. The above-mentioned green herbal fragrance is a fragrance profile that includes either a green note or a herbal note. A green note refers to a refreshing fragrance profile reminiscent of grass or young leaves. A herbal note refers to a fragrance profile characterized by a natural, medicinal scent derived from herbs. Examples of fragrances having a green herbal aroma include cis-3-hexenol, cis-3-hexenyl formate, cis-3-hexenyl acetate, cis-3-hexenyl propionate, cis-3-hexenyl butyrate, trans-2-hexenal, trans-2-hexenyl acetate, hexyl acetate, styraryl acetate, 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal (IFF company name, Helional), 3 Examples include (4)-(5-ethylbicyclo[2,2,1]heptyl-2)-cyclohexanol, 2-pentyloxyglycolate allyl (IFF company name, allylamyl glycolate), 4-methyl-3-decen-5-ol (Givaudan company name, undecaverthol), hexylaldehyde, 2,4-dimethyl-3-cyclohexenylcarboxyaldehyde (IFF company name, tripral), and phenylacetaldehyde. Furthermore, examples of fragrances having a green herbal aroma include l-menthol, 1,8-cineole, methyl salicylate, citronellal, camphor, borneol, isobornyl acetate, terpinyl acetate, eugenol, anethole, 4-methoxybenzyl alcohol, and estragol. Examples of functional ingredients having a cooling function (functional ingredients having a cooling function may be referred to as "cooling ingredients") include those known as cooling agents in the art, such as those that act on receptor activation channels (TRPM8) in nerves of the skin, such as menthol (e.g., l-menthol) and its derivatives, methyl salicylate, camphor, and essential oils derived from plants (e.g., mint, eucalyptus). Furthermore, examples of functional ingredients having a cooling function include those that lower the ambient temperature through evaporative cooling, such as alcohol, such as methanol and ethanol. Examples of functional ingredients having the above-mentioned deodorizing function (functional ingredients having the above-mentioned deodorizing function may be referred to as "deodorizing ingredients") include those known as deodorants in this technology. Examples of the above-mentioned skin care function include anti-inflammatory function, antipruritic function, rash prevention function, moisturizing function, etc., and examples of functional ingredients having the above-mentioned skin care function include menthol, methyl salicylate, etc. Furthermore, functional ingredients having the above-mentioned skincare functions may be referred to as skincare ingredients, and functional ingredients having anti-inflammatory, antipruritic, rash-preventing, and moisturizing functions may be referred to as anti-inflammatory ingredients, antipruritic ingredients, rash-preventing ingredients, and moisturizing ingredients, respectively. Each of the first and second functional components is volatile. The preferred vapor pressure of the volatile component varies depending on the function it is to perform, but the first and second functional components have a vapor pressure of preferably 30 Pa or more, more preferably 50 Pa or more, and even more preferably 70 Pa or more at 25°C and 1 atm. If the vapor pressure is too low, it tends to be difficult to perform the desired function, and if the vapor pressure is too high, the functional component tends to volatilize and decrease in amount before the user uses the absorbent article, or it may exert an excessive function on the wearer's skin. The above-mentioned water-disintegrating microcapsules contain a first functional component inside and dissolve upon contact with a liquid such as bodily fluids, releasing the first functional component to the outside. The released first functional component then vaporizes due to the wearer's body temperature and exerts its function on the wearer's skin. The degree of water disintegration of the above-mentioned microcapsules depends on how the first functional component is released after contact with the liquid. For example, to rapidly release the first functional component after contact with the liquid, high water disintegration is preferable, and to release the first functional component slowly, low water disintegration is preferable. In the manufacturing method of this disclosure, if the microcapsules disintegrate upon dissolution in water, the microcapsules have a water solubility of preferably 10 to 300 g, more preferably 20 to 200 g, and even more preferably 30 to 100 g per 100 g of water at 25°C. The above water solubility is measured according to the OECD Guideline No. 105 Flask Method, except that the test temperature is set to 25°C. The above-mentioned microcapsules are preferably insoluble in the solvent that serves as the dispersion medium for the microcapsules, and preferably do not swell in the solvent that serves as the dispersion medium for the microcapsules. This is from the viewpoint of protecting the first functional component contained within. For example, at 25°C, the above-mentioned microcapsules have a solvent solubility of preferably 1.0 g or less, more preferably 0.5 g or less, and even more preferably 0.1 g or less per 100 g of the solvent that serves as the dispersion medium for the microcapsules. The solvent solubility described above is evaluated by adding 1.0 g (0.5 g, 0.1 g) of the sample to 100 g of solvent at 25°C, letting it stand for 24 hours, stirring gently if necessary, and then visually inspecting whether the sample has dissolved. Examples of materials for the above-mentioned microcapsules include sugars, such as monosaccharides (e.g., glucose), disaccharides (e.g., sucrose), polysaccharides (e.g., dextrin, glucomannan, sodium alginate, water-soluble starch, etc.), gelatin, and water-soluble polymers (e.g., polyvinyl alcohol, polyvinyl acetate, etc.). The above microcapsules preferably contain 50% by mass or more, and more preferably 70% by mass or more, of those that pass through a sieve with a mesh size of 75 μm and remain on a sieve with a mesh size of 45 μm. This is from the viewpoint of the dispersibility of the microcapsules in the solvent and their coating properties. The above-mentioned microcapsules are commercially available, for example, INCAP (trademark) sold by Symrise Inc. Furthermore, the above-mentioned microcapsules can also be manufactured by dissolving the microcapsule material in water to form an aqueous solution, mixing the first functional component and a surfactant into the aqueous solution, and then drying the aqueous solution under reduced pressure while spraying it. The solvent described above is preferably one that can retain the first functional component while it is encapsulated in microcapsules, and if the functional composition further contains a volatile second functional component dissolved in the solvent, the solvent is preferably one that dissolves the second functional component without dissolving or swelling the microcapsules. The solvent used to disperse the microcapsules may be referred to as the first solvent to distinguish it from the second solvent that can be encapsulated in the microcapsules, as described later. From the viewpoint of not disintegrating water-disintegrating microcapsules, the solvent is preferably a lipophilic solvent. From the viewpoint of lipophilicity, the solvent has an IOB of 0.00 or higher, preferably 1.0 or lower, more preferably 0.8 or lower, and even more preferably 0.6 or lower. IOB (Inorganic Organic Balance) is an index that indicates the balance between hydrophilicity and lipophilicity, and in this specification, it refers to the value calculated by the following formula by Oda et al.: IOB = Inorganic value / Organic value. The inorganic and organic values ​​mentioned above are based on the organic conceptual diagram described in Fujita, Atsushi, "Prediction of Organic Compounds and Conceptual Diagrams of Organic Compounds," Chemistry Vol. 11, No. 10 (1957), pp. 719-725). The organic and inorganic values ​​of major groups, as determined by Fujita, are summarized in Table 1 below. Furthermore, from the viewpoint of the coating properties of the functional composition, the above solvent preferably has a kinematic viscosity of 0.01 to 80 mm² / s at 40°C. The above kinematic viscosity is measured at a test temperature of 40°C using a Cannon-Fenske backflow viscometer in accordance with "5. Kinematic Viscosity Test Method" of JIS K 2283:2000. The solvent described above preferably has a vapor pressure of 0.00 to 0.01 Pa, more preferably 0.000 to 0.001 Pa, and even more preferably 0.0000 to 0.0001 Pa at 1 atmosphere and 25°C. Considering that the absorbent articles produced by the manufacturing method of this disclosure are used in contact with the human body, the solvent preferably has a vapor pressure of 0.00 to 0.01 Pa, more preferably 0.000 to 0.001 Pa, and even more preferably 0.0000 to 0.0001 Pa at 1 atmosphere and 40°C. This is because a high vapor pressure can cause vaporization during storage, leading to a decrease in the amount of the solvent and the desired second functional component, as well as problems such as odor when worn. Examples of the above solvents include lipophilic alcohol-based solvents, ester-based solvents, ether-based solvents, ketone-based solvents, and hydrocarbon-based solvents. An example of the above hydrocarbon-based solvent is liquid paraffin, and an example of the above ester-based solvent is isopropyl myristate. Furthermore, the solvent may also contain a component having an IOB of 0.00 to 0.60, a kinematic viscosity of 0.01 to 80 mm² / s at 40°C, a water content of 0.01 to 4.0% by mass, and a weight-average molecular weight of less than 1,000 (hereinafter sometimes referred to as a "body fluid lubrication agent"). The above-mentioned fluid lubrication agent has the same components as the "blood modifier" described in the applicant's application, International Publication No. 2012 / 133724, and is also the same component as the "blood lubrication agent" described in International Publication No. 2013 / 129236. By including the fluid lubrication agent in the solvent, the fluids that reach the permeable layer can be rapidly slid into the interior of the absorbent for a long period of time. Examples of the above-mentioned fluid lubrication agents include, for example, triglycerides such as Panacete 810s and Panacete 800 manufactured by NOF Corporation, and hydrocarbons such as Pearlream 6 manufactured by NOF Corporation. The above solvents are PPG-4 butyl ether, PPG-12 butyl ether, PPG-17 butyl ether, PPG-20 butyl ether, PPG-24 butyl ether, PPG-33 butyl ether, PPG-40 butyl ether, PPG-52 butyl ether, PPG-3 myristyl ether, PPG-10 cetyl ether, PPG-11 stearyl ether, PPG-15 stearyl ether, PPG-2 lanolinol ether, PPG-5 lanolinol ether, and PPG-10 lanolinol ether. It may contain components selected from the group consisting of tel, PPG-20 lanolinol ether, PPG-26 oleate, PPG-36 oleate, PPG-5.5 castrate, PPG-6 glyceryl ether, PPG-8 glyceryl ether, PPG-10 glyceryl ether, PPG-16 glyceryl ether, PPG-9 diglyceryl ether, PPG-14 diglyceryl ether, PPG-25 sorbitol, and PPG-33 sorbitol, as well as any combination thereof. The above solvents are PPG-30 cetyl ether, PPG-15 isohexadecyl ether, PPG-4 lauryl ether, PPG-20 distearate, PPG-12 dilaurate, PPG-15 dicocoate, PPG-10 cetyl phosphate, PPG-9 laurate, PPG-8 dioctate, PPG-15 stearate, PPG-8 diethylhexylate, PPG-10 glyceryl stearate, PPG-2 cocamide, PPG-10 taloamine, PPG-10 oleamide, PPG-5 sucrose cocoate, PPG-20 methyl glucose ether distearate, PPG-20 methyl glucose ether acetate, PPG-20 sorbitan tristearate, and PPG-20 methyl glucose ether The product may contain components selected from the group consisting of distearate, PPG-15 stearyl ether benzoate, PPG-10 sorbitan monostearate, PPG-10 hydrogenated castor oil, PPG-10 cetyl ether phosphate, PPG-10 dinonyl phenolate, PPG-7 lauryl ether, PPG-5 lanolin wax ether, PPG-5 lanolin wax, PPG-4 jojoba alcohol ether, PPG-3 myristyl ether propionate, PPG-3 benzyl ether myristrate, PPG-3 hydrogenated castor oil, PPG-3 hydroxyethyl soyamide, PPG-2 lanolin alcohol ether, and PPG-1 coconut fatty acid isopropanolamide, as well as any combination thereof. In the manufacturing method of this disclosure, if the functional composition contains a second functional component dissolved in a solvent, the functional composition present in the functional composition-coated area of ​​the manufactured absorbent article can exert the desired function at the desired timing. Specifically, this is as follows: When the user opens the absorbent article, the second functional component dissolved in the solvent (first solvent) volatilizes, and the function of the second functional component is imparted to the user. For example, if the second functional component is an aromatic component, the user can perceive the aroma wafting around them. Furthermore, if the second functional component is a deodorizing component, when the user opens the absorbent item, the second functional component will exert its deodorizing function, making it less likely for the user to notice the odor originating from the liquid absorbed by the absorbent item that needs to be replaced. The release amount of the second functional component can be changed depending on the amount of the second functional component, the vapor pressure of the second functional component, etc. For example, by increasing the amount of the second functional component contained in the absorbent article, selecting a second functional component with a high vapor pressure, etc., the second functional component can be released into the surroundings at a high concentration in a short time. On the other hand, for example, by selecting a second functional component with a low vapor pressure, the second functional component can be released into the surroundings over a long period of time. In addition, when the absorbent article is commercially available by packaging individual packaged absorbent articles together, adjusting the form of the individual packaging and the form of the packaging, for example, individually packaging the absorbent article with a breathable non-woven fabric and packaging a plurality of individually packaged absorbent articles with a polymer film, the second functional component can exhibit its function from the moment the user opens the package. Next, when the wearer wears the absorbent article, the vaporization of the second functional component is promoted by the body temperature of the wearer, etc., and the function of the second functional component is promoted. For example, when the second functional component is an aromatic component, a cooling component, a deodorizing component, an antibacterial component or a skin care component, the aromatic function, the cooling function, the deodorizing function, the antibacterial function or the skin care function is promoted, respectively. Next, when the absorbent article absorbs a liquid, the absorbed liquid causes the water-disintegrating microcapsules to disintegrate, and the first functional component is released from the microcapsules and exhibits its function. For example, when the first functional component is an aromatic component, a cooling component, a deodorizing component, an antibacterial component or a skin care component, the aromatic function, the cooling function, the deodorizing function, the antibacterial function or the skin care function can be exhibited, respectively. The release amount of the first functional component can be changed depending on the amount of the first functional component, the vapor pressure of the first functional component, the solubility of the microcapsules in water, the thickness of the microcapsule layer, the particle size of the microcapsules, etc. For example, by increasing the amount of the first functional component contained in the absorbent article, selecting a first functional component with a high vapor pressure, selecting a material with high solubility in water as the microcapsule material, reducing the thickness of the microcapsule layer, or reducing the particle size of the microcapsule, the first functional component can be released into the surroundings in a short time at a high concentration. Furthermore, the first functional component can be released gradually by, for example, reducing the amount of the first functional component contained in the absorbent article, selecting a first functional component with a low vapor pressure, selecting a material with low solubility in water as the microcapsule material, increasing the thickness of the microcapsule layer, or increasing the particle size of the microcapsule. Furthermore, the above-mentioned microcapsules may contain a solvent in addition to the first functional component, for the purpose of controlling the release of the first functional component (this solvent may be referred to as the "second solvent"). The second solvent may be the same as that of the first solvent. The above functional composition contains microcapsules containing the first functional component in a ratio of preferably 0.1 to 60% by mass, more preferably 5 to 40% by mass, and even more preferably 10 to 30% by mass. This is from the viewpoint of the coating properties of the functional composition. The amount of the first functional component in the functional composition varies depending on the function of the first functional component, but generally, the above functional composition contains the first functional component in a ratio of preferably 0.01 to 30% by mass, more preferably 0.05 to 20% by mass, and even more preferably 1 to 15% by mass. If the above functional composition contains a second functional component, the amount of the second functional component that the functional composition should contain will vary depending on the function of the second functional component, but generally, the above functional composition contains the second functional component in a ratio of preferably 0.01 to 20% by mass, more preferably 0.05 to 15% by mass, and even more preferably 0.1 to 10% by mass. In the absorbent article manufactured by the manufacturing method of the present disclosure, the absorbent layer can contain a superabsorbent material. In this embodiment, since the superabsorbent material holds, adsorbs, etc. the solvent of the functional composition around it, the absorbed liquid is likely to come into contact with the microcapsules, and the microcapsules are likely to dissolve. Examples of the superabsorbent material include starch-based, cellulose-based, and synthetic polymer-based superabsorbent materials. Examples of the starch-based or cellulose-based superabsorbent material include starch-acrylic acid (salt) graft copolymer, saponified product of starch-acrylonitrile copolymer, cross-linked product of sodium carboxymethyl cellulose, etc. Examples of the synthetic polymer-based superabsorbent material include polyacrylate-based, polysulfonate-based, maleate anhydride-based, polyacrylamide-based, polyvinyl alcohol-based, polyethylene oxide-based, polyaspartate-based, polyglutamate-based, polyalginate-based, starch-based, cellulose-based superabsorbent resins, etc. Among these, polyacrylate-based (particularly, sodium polyacrylate-based) superabsorbent resins are preferred. When the functional composition contains a first functional component and a second functional component, they are selected from any perspective. For example, by selecting the first functional component from cold sensation components and the second functional component from fragrance components, after the absorbent article is opened, a fragrance is provided to the wearer, and after absorbing body fluids, a cold sensation is provided to the wearer. In addition, since the size of the night-time absorbent article is large, it tends to get stuffy during wearing. However, by adopting a cold sensation component as the first functional component, it becomes less likely for the wearer to feel discomfort. By selecting the first and second functional components from different fragrance components, the functional components can be used as indicator materials to inform users, particularly mothers and caregivers in the case of disposable diapers, that bodily fluids have been absorbed. Furthermore, by selecting the first and second functional components from the same fragrance component and varying their amounts, the fragrance can be accented. For example, before liquid absorption, a subtle fragrance derived from the second functional component can be emitted, and after liquid absorption, a stronger, identical fragrance derived from the first functional component can be emitted. Additionally, by using a deodorizing component or a fragrance component, preferably a fragrance component with high fragrance intensity, as the first functional component, the functional components can be used as fragrance masking materials. Examples of absorbent articles manufactured by the method of this disclosure include sanitary napkins, panty liners, disposable diapers, and incontinence pads. The present disclosure will be explained below with reference to examples, but the present disclosure is not limited to these examples. [Example 1] INCAP MENTHOL / IPM manufactured by Symrise was prepared as a microcapsule containing the first functional ingredient. INCAP MENTHOL / IPM contains a cooling ingredient (menthol) as the first functional ingredient, and the material of the microcapsule was material-modified starch. A solvent containing a fragrance ingredient as the second functional ingredient was prepared. The solvent was IPM (isopropyl myristate). Functional composition No. 1 was prepared by mixing the microcapsule and the solvent in a mass ratio of 50:50. Sanitary napkin No. 1 shown in Figure 1 was manufactured using the manufacturing process shown in Figure 3, and then sanitary napkin No. 1 was individually packaged with polyethylene film. In the functional composition coating area, the basis weight of the functional composition was 4 g / m2. When sanitary napkin No. 1 was used by several volunteer subjects, they reported that a fragrance emanated from sanitary napkin No. 1 after opening the individual packaging and while wearing it, and that they felt a cooling sensation in the area in contact with absorbent material No. 1 after sanitary napkin No. 1 had absorbed menstrual blood. Specifically, this disclosure relates to the following J1 to J14. [J1] A method for producing an absorbent article comprising a liquid permeable layer, a liquid impermeable layer, and an absorbent layer between the liquid permeable layer and the liquid impermeable layer, comprising the steps of: mixing water-disintegrable microcapsules containing a volatile functional component with a solvent capable of retaining the functional component encapsulated in the microcapsules to form a functional composition; coating at least a portion of the surface to be coated of a layer to be coated with the functional composition to form a functional composition coated area on the surface to be coated; and stacking the liquid permeable layer, the absorbent layer, and the liquid impermeable layer with an adhesive coated area in between. [J2] The method according to J1, wherein the layer to be coated has a fiber density of 0.02 to 0.1 g / cm³. [J3] The method according to J1 or J2, wherein the layer to be coated has a thickness of 0.2 to 1.0 mm. [J4] The method according to any one of J1 to J3, wherein in the step of forming the functional composition coating area, the surface to be coated is coated with the functional composition by a contact coating method. [J5] The method according to any one of J1 to J4, wherein the surface to be coated or the surface facing the surface to be coated has the adhesive coating area, and in the step of forming the functional composition coating area, at least a part of the adhesive coating area of ​​the surface to be coated or the area facing the adhesive coating area of ​​the surface to be coated is coated with the functional composition, and the adhesive coating area has a microcapsule holding area that holds the microcapsules in a range that overlaps with the functional composition coating area in the thickness direction of the absorbent article. [J6] The method according to any one of J1 to J4, further comprising the step of applying the adhesive to at least a portion of the functional composition coating area or an area facing the functional composition coating area, after the step of forming the functional composition coating area, to form an adhesive coating area that overlaps with the functional composition coating area in the thickness direction of the absorbent article. [J7] The method according to any one of J1 to J6, further comprising the step of forming an embossed portion by embossing at least the liquid permeable layer and the absorbent layer with the functional composition coating region in between, after the step of forming the functional composition coating region. [J8] The method according to any one of J1 to J7, wherein the absorbent layer comprises a highly absorbent material. [J9] The method according to any one of J1 to J8, wherein the functional component has a function selected from the group consisting of fragrance function, cooling function, deodorizing function, antibacterial function, skin care function, and any combination thereof. [J10] The method according to any one of J1 to J9, wherein the functional composition further comprises a volatile second functional component dissolved in the solvent. [J11] The method according to any one of J1 to J9, further comprising the step of coating the surface to be coated with a solvent containing the second functional component before or after the step of forming a coating area of ​​the functional composition. [J12] The method according to J10 or J11, wherein the second functional component has a function selected from the group consisting of fragrance function, cooling function, deodorizing function, antibacterial function, skin care function, and any combination thereof. [J13] The method according to any one of J1 to J12, wherein the surface to be coated is the non-skin contact surface of the liquid permeable layer. [J14] The method according to any one of J1 to J12, wherein the absorbent article includes an auxiliary sheet layer between the liquid permeable layer and the absorbent layer, and in the step of forming the functional composition coating area, the surface of the auxiliary sheet layer on the liquid permeable layer side or the surface on the absorbent layer side is coated with the functional composition to form the functional composition coating area on the surface on the liquid permeable layer side or the surface on the absorbent layer side. 1 Absorbent article 2 Top sheet 3 Back sheet 4 Absorbent material 5 Side sheet 6 Side flap 7 Embossed section 8 Functional composition application area 9 Adhesive application area 10 Adhesive area 11 Microcapsule holding area 12 Auxiliary sheet 13 Coater 101 Top sheet roll 102 Functional composition application machine 103, 122 Adhesive application machine 104 Absorbent material manufacturing device 105 Material supply section 106 Suction drum 107 Concave mold 108 Suction section 109, 123 Stacked items 111, 131 Embossed roll 121 Back sheet roll 141 Cutter

Claims

Revised 29 / 03 / 2017 1. Method for fabricating an absorbent product consisting of a permeable layer, an impermeable layer, and an absorbent layer between the permeable and impermeable layers, comprising the following steps: Preparation of the functional component by mixing water-insoluble microencapsulated components encapsulating volatile functional components and a solvent capable of retaining the encapsulated functional components; preparation of a functional component coating area on the coating surface of the layer to be coated by coating the functional component onto at least a portion of the coating surface of the layer to be coated; and stacking of the permeable, absorbent, and impermeable layers sandwiching an adhesive coating area.

2. Method as specified in Reputation 1 where the coating layer has a fiber density of 0.02 to 0.1 g / cm³.

3. Method as specified in Reputation 1 or 2 where the coating layer has a thickness of 0.2 to 2.0 mm. 4.One of the methods specified in Reachments 1 to 3 in which, during the functional component coating process, the coating surface is coated with the functional component by the lamination method.

5. One of the methods specified in Reachments 1 to 4 in which the coating surface or the surface facing the coating surface has an adhesive area and, during the functional component coating process, at least part of the adhesive area of ​​the coating surface or the area facing the adhesive area of ​​the coating surface is coated with the functional component and the adhesive area contains a microcapsule storage area that overlaps with the functional component coating area in the direction along the thickness of the absorbed product. 6.Any of the methods specified in Reachments 1 to 4, where, following the functional coating process, an additional assembly procedure is performed by applying an adhesive to at least a portion of the functional coating area or the area facing the functional coating area, overlapping the adhesive coating area with the functional coating area in the direction of the thickness of the absorbent product.

7. Any of the methods specified in Reachments 1 to 6, where, following the functional coating process, an additional assembly procedure is performed by embossing at least a permeable layer and an absorbent layer adjacent to the functional coating area.

8. Any of the methods specified in Reachments 1 to 7, where the absorbent layer consists of superabsorbent material. 9.

10. Any of the methods specified in Reachments 1 through 8, where the functional compound has a function of choice from a group comprising fragrance, cooling, deodorizing, antibacterial, skin care functions, and any combination of these functions.

11. Any of the methods specified in Reachments 1 through 9, where the functional compound is further incorporated with a second volatile functional compound dissolved in a solvent.

12. Any of the methods specified in Reachments 1 through 9, where, before or after any stage of the functional compound coating process, the method is further incorporated with a solvent-based coating process mixed with a second functional compound.

13. Any of the methods specified in Reachments 10 or 11, where the second functional compound has a function of choice from a group comprising fragrance, cooling, deodorizing, antibacterial, skin care functions, and any combination of these functions.

14. Any of the methods specified in Claims 1 through 12 where the absorbent product consists of a reinforcing layer between the permeable layer and the absorbent layer, and in the functional component coating process the permeable layer surface or the absorbent layer surface of the reinforcing layer is coated with a functional component to form a functional component coating area on the permeable layer surface or on the absorbent layer surface.The method for manufacturing an absorbent product consisting of a permeable layer, an impermeable layer, and an absorbent layer sandwiched between the permeable and impermeable layers, comprises the following steps: the preparation of functional components by mixing water-insoluble microencapsulations that encapsulate volatile functional components and solvents capable of storing the encapsulated functional components within the microencapsulations; the preparation of a coating area for the functional components on the surface of the coating layer by coating at least a portion of the coating surface of the coating layer; and the stacking of the permeable, absorbent, and impermeable layers sandwiched between adhesive coating areas.

2. The method specified in Reputation 1, where the fiber density of the coating layer is 0.02 to 0.1 g / m³.

3. The method specified in Reputation 1 or 2, where the thickness of the coating layer is 0.2 to 2.0 mm. 4.

5. One of the methods specified in Claims 1-3, in which, during the functional component coating process, the coating surface is coated with the functional component using an adhesion coating method.

6. One of the methods specified in Claims 1-4, in which, the coating surface or the surface facing the coating surface has an adhesive area, and during the functional component coating process, at least part of the adhesive area of ​​the coating surface or the area facing the adhesive area of ​​the coating surface is coated with the functional component, and the adhesive area contains a microcapsule storage area that overlaps the functional component coating area in the direction of the thickness of the absorbed product.

7. Any of the methods specified in Claims 1-4, where, following the functional coating step, an adhesive layer is applied to at least one part of the functional coating area or the area facing the functional coating area, overlapping the functional coating area in the direction of the thickness of the absorbent product.

8. Any of the methods specified in Claims 1-6, where, following the functional coating step, an embossing step is applied to at least one permeable layer and an absorbent layer adjacent to the functional coating area.

9. Any of the methods specified in Claims 1-7, where the absorbent layer consists of superabsorbent material.

10. Any of the methods specified in claims 1 through 8, where the functional compound has a function of choice from a group consisting of fragrance function, cooling function, scenting function, antibacterial function, skin care function, and any combination of these functions.

11. Any of the methods specified in claims 1 through 9, where the functional compound is further composed of volatile functional compounds dissolved in a solvent.

12. Any of the methods specified in claims 1 through 9, where, before or after any stage of the functional compound coating process, a solvent-based surface coating process is applied with a second functional compound.

13. Any of the methods specified in claims 1 through 9, where the second functional compound has a function of choice from a group consisting of fragrance function, cooling function, scenting function, antibacterial function, skin care function, and any combination of these functions.

14. Any of the methods specified in Claims 1 through 12, in which the absorbent product consists of a reinforcing layer between the permeable layer and the absorbent layer, and in the functional component coating process, the permeable layer surface or the absorbent layer surface of the reinforcing layer is coated with a functional component to form a functional component coating area on the permeable layer surface or on the absorbent layer surface;